

All the loaded torrents in a torrent client already get stored somewhere in the torrent client’s own settings folders. e.g. if you look in qBittorrent’s settings folders you’ll find a folder full of .torrent files representing every single torrent currently in the torrent client.
So if it’s a torrent I’m going to leave loaded in the torrent client then no, there’s no reason to save a second copy of the .torrent file. But I guess if it’s a torrent I’m not going to load in the torrent client, or will remove it from there, then maybe it’s worth saving depending how you do things.
I’m undecided. I figure if I save them and back them up to an offline/offsite device, then I can (mostly/hopefully) recover from hardware failure by simply re-adding all the torrent files to my favorite client.
It would be better just to back up your entire torrent client settings folders, you’ll save all the .torrent files along with the save folders and other information you have in the torrent client.
Perhaps just uninstalling Nouveau and falling back to the Intel driver, if it’s already installed, is sufficient? Or if that doesn’t work, worst case OP could blacklist Nouveau and and update initramfs? I’m just guessing as long as the Nvidia driver is never actually active perhaps that’s enough to avoid excess power consumption.
OTOH there isn’t much harm in OP keeping Nouveau enabled and seeing how things go though I’m in agreement with you, on an older laptop there’s not much advantage to be gained with the older Nvidia hardware.